ACL_GET_FD
Section: C Library Functions (3)
Page Index
BSD mandoc
Linux ACL
NAME
acl_get_fd
- get an ACL by file descriptor
LIBRARY
Linux Access Control Lists library (libacl, -lacl).
SYNOPSIS
In sys/types.h
In sys/acl.h
Ft acl_t
Fn acl_get_fd int fd
DESCRIPTION
The
Fn acl_get_fd
function retrieves the access ACL associated with the file referred to by
fd
The ACL is placed into working storage and
Fn acl_get_fd
returns a pointer to that storage.
In order to read an ACL from an object, a process must have read access to
the object's attributes.
This function may cause memory to be allocated. The caller should free any
releasable memory, when the new ACL is no longer required, by calling
acl_free3
with the
(void*)acl_t
returned by
Fn acl_get_fd
as an argument.
RETURN VALUE
On success, this function shall return a pointer to the
working storage. On error, a value of
(acl_t)NULL
shall be returned, and
errno
is set appropriately.
ERRORS
If any of the following conditions occur, the
Fn acl_get_fd
function returns a value of
(acl_t)NULL
and sets
errno
to the corresponding value:
- Bq Er EBADF
-
The
fd
argument is not a valid file descriptor.
- Bq Er ENOMEM
-
The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management constraints.
- Bq Er ENOTSUP
-
The file system on which the file identified by
fd
is located does not support ACLs, or ACLs are disabled.
STANDARDS
IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)
SEE ALSO
acl_free3,
acl_get_entry3,
acl_get_file3,
acl_set_fd3,
acl(5)
AUTHOR
Derived from the FreeBSD manual pages written by
An Robert N M Watson Aq
rwatson@FreeBSD.org ,
and adapted for Linux by
An Andreas Gruenbacher Aq
a.gruenbacher@bestbits.at .